THE sister of a man badly injured after an attack in his own home has pleaded for a mystery caller to come forward.

Michael Hewitt, 54, pictured, remains in a critical condition in the University Hospital of Wales, Cardiff, after he was attacked at home in Oakfield Street, Roath, on February 7.

But a mystery caller made an anonymous and potentially lifesaving call to the police from a phone box in St Fagans Road, Fairwater, just after 11am that morning, telling them to go to Michael’s home.

Police said they were investigating the assault, which left Michael with face and head injuries.

Michael’s elder sister, Christine, from Splott, has been to visit him in hospital every day and is mystified as to the motive for the attack.

She said: “Michael was a very private person and I can’t understand why anybody would want to hurt him in this way and cause him such terrible injuries. Someone out there knows what this is about and who attacked Michael. I would ask them to contact the police as soon as possible.”

Police say they have made extensive inquiries since the attack and officers have been speaking to Michael’s friends to try to find out more about his movements in the days and hours leading up to morning he was found.

They said a man visited Michael’s ground-floor flat on the morning he was found but left when he could not get an answer at the door. He was described as around 55, white, 5ft 10in, stocky, with a shaven head and was wearing dark clothes and a bomber jacket.

Detective Inspector Ceri Hughes added: “We need to know who this man is and who else may have visited Michael over that weekend, particularly from Saturday afternoon. I would also once again appeal for the person who made the original 999 call to contact us in confidence. This person might have saved Michael’s life and will no doubt have crucial information on what’s taken place.”

Anyone with information is asked to contact Roath CID on 029 2052 7261, or Crimestoppers on 0800 555 111.